Excellent for post-operative patients in need of lateral support, the 637 LSO provides relief for secondary back pain resulting from surgery or injury. The addition of moveable, rigid side panels provide lateral support and a comfortable environment for healing. The 637 provides a therapeutic level of compression for targeted pain relief. One-size adjustable, all Horizon braces comfortably fit waists ranging from 24-70 inches*, and can be stepped down to the PRO (Pain Relief Orthosis) for the treatment of recurring back pain.